Linux · Windows Subsystem for Linux (WSL)

What does the Windows Subsystem for Linux let you do that a virtual machine setup does not, and roughly when did it arrive?

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More in Windows Subsystem for Linux (WSL)

A colleague says WSL1 already ran a Linux kernel and WSL2 just made it faster. Where is that wrong, and what actually changed in WSL2?

Before WSLg, how could you show a Linux GUI program on Windows, and what did WSLg change about that?

Someone runs Docker Desktop on Windows and assumes it has nothing to do with WSL. Why is that assumption off?

What are the Windows edition and setup requirements to get WSL running?

Two Windows users on the same PC both want Ubuntu under WSL. Why can't they just share the one installation, and what privileges does the WSL user get?

You open three WSL windows of the same distribution. Are these like three separate Docker containers, and how would you tell?